Pulverizer



Jan. 15, 1929. 1,698,158

v P. S. KNITTEL 111m/1m1z11114 Filed oct. 21, 1927 Suva 11 toz m7 Mm per will fill up and a plurality of series grate bar section 5.

v partition wall 15 similar to the wall 8.' A

third gate 16 pivoted adjacent the partition Patented Jan. 15, 1929.

vtestcase i FICE.

PAU; s. xmrrnnbaansmrcirr, NEW JERSEY. rULvEaIzEa. ,Y

Application led October 21 This invention relates to rotary crushers and pulverizers, especially to their grate bar ystfem and discharge openings in their lower The principal object of the present'invention is to make provision for varying the size of product from the same machine and equipment. l

lAnother object of the invention is4 to secure various sizes of products by providing of grate bars for delivering the -desired sizes of product with partitions separating the respective outlets and With 'suitable gates controlling the\` outlets. l

The invention accordingly consistsin the combination of elements and arrangements of parts wherein a more effective crusher is secured.

In the accompanying drawing, wherein' like symbols refer to like parts wherever they occur, v 1

Fig. 1 is a vertical cross-section taken through the center of a rotarypulverizer;

Fig. 2 is a vertical length section taken through right hand half of the mcahine and a rear view of it.

My invention is shown in connection with a pulverizer of which the side walls 1 and 2, front wall 3 and rear wall 4.- form thel discharge opening. The grate bars 5, 6 and 7 aresections' supported by the sidewalls 1 and 2.` At the lowest edge of grate bar section 5 fastened to the side walls l and 2 is placed a lcross wall 8. Together with the gate 9 which is hinged to the side Walls 1 and' 2 cross wall 8 forms an extra hopper under, grate bar section '5. Closing gate 9 this hopclose the openings in The gate 14 similar to gate 9 may be pivoted adjacent the partition 8 to control the outlet from the grate bar 6 by closing against the 15 willcontrol the outlet from the grate bar 7. -The gates 9, 14 and 16 are shown of the same construction to illustrate one wa of controlling independently the outlets fiiom the respective grate bars.' It will be understood that other suitable mechanism may be utilized for this purpose.

' The material is fed to the :machine at 10,

'.broken up by rings, hammers, sectors-11,-

etc., as the machine may be equipped. Crushed and driven through the openings v coal, has to pass over bars or losing time in Obviously, the 1nvent1on admits of consldy, 1922. serial No. 227,729.. l

rial will pass into the dischargev opening formed by Walls 1, 2, 3 and 4. As'the various ates can be closed by chains or levers 12 and ept closed by and washers 'byclosing the gate 9 the machine lls up the hopper under grate bar section 5 and the following material has lto pass charged through sections 6 and 7 dependin upon whether one or both of the gates 14 and 16 are open. Therefore, it must be small enough to pass the openings in 6 and 7.

As section. 5 has larger openings for al product of larger size a plurality of dierent products can be produced when theopenings 1n 5 correspond with the hardness of the material and velocity of machine to allowl suiiicient and large enough openings, the coal will be crushed to size and driven through sector 5 giving a lar for stokers. After te 'daily supply is furnishe'dngate 9 is closed. The hopper under'- neath fills up and therefore the following and through the sectors 6 and 7 As their openings correspond with the size of product required by the powdered coal machineryr-for instance-a one quarter inch product, the machine is able to furnish o ne or more sizeswithout changing grate the running.

erable modification without departing from the invention; therefore, I do not wish to be restricted to the particular forms and arrangements shown in the drawing: What I claim is: 1. A rotary pulverizer`or crusher having a grate bar system as grinding surface saidv grate bars'being spaced with a gate underneathand a cross wall at the end of the larger in the grate bar sections 5,'6 and?v the'niateover section 5 to be dise size product suitableopenings whereby when said gate is closed aproduct corresponding with the smaller size openings is produced and when the gate is open a larger product is obtained through the larger openings.

2. A rotary pulverizer or crusher having a grateV bar system as grinding surface said grate bars being spaced with larger openings Yin front and smaller openings in 'the back with a gate underneath and a cross Wall at the end of the larger openings whereby when said gate is closed avproduct corresponding With the smaller size openings is produced and when the gate is open a larger product is obtained through the larger openings in front.

v3. A rotary pulverizer or crusher having a grate bar system as grinding surface sai-d grate bars being s aced With larger openings infront and sma ler openings in the back with louvres underneath and a cross Wall atl the end of the larger openings whereby When said louvres are closed, a product corresponding with the smaller slze openlngs 1s prog duced and when the louvres are open, a larger product is obtained through the larger openings in front. Y

, 4. A rotary crusher and pulverizerhaving grate bar sections or different openings as grinding surface Which can be closed by v gates forming individual hoppers with cross- Walls at the end of each section allowing the production of corresponding products from each section to be delivered from separate outlets or a single product from one section accordlng to the closing or opening of the gates.

rotary crusher having grate bar sections With different sized openings as grinding surfaces, means for forming independent outlets from each of the sections and devices for controlling the said outlets to allow the trolling certain of said outlets whereby prodr ucts of different sizes may be delivered independently from the saine crusher.

PAUL S. KNITTEL. 

